Question

我有一些UIButton s，我正在以编程方式在其上设置自定义字体，如下所示：

Button1.titleLabel.font = [UIFont fontWithName:@"myCustomFont" size:16];
Button2.titleLabel.font = [UIFont fontWithName:@"myCustomFont" size:16];
Button3.titleLabel.font = [UIFont fontWithName:@"myCustomFont" size:16];
Button4.titleLabel.font = [UIFont fontWithName:@"myCustomFont" size:16];
Button5.titleLabel.font = [UIFont fontWithName:@"myCustomFont" size:16];
Button6.titleLabel.font = [UIFont fontWithName:@"myCustomFont" size:16];

这段代码是正确的并且有效，但它似乎不是最简单的编写方式。有没有办法循环使用这些元素？

我想象过这样的事情：

for (int i = 1; i <= 5; i++) {
    Button(i).titleLabel.font = etc.. // How would I get the value of 'i'?
}

或者这只是一个坏主意？

Answer 1

您可以使用NSArray迭代：

UIFont *font = [UIFont fontWithName:@"myCustomFont" size:16];
NSArray *buttons = [NSArray arrayWithObjects: Button1, Button2, Button3, 
                                              Button4, Button5, Button6, 
                                              nil];
for (UIButton *button in buttons) {
  button.titleLabel.font = font;
}

Answer 2

你可以这样做：

NSMutableArray *buttons = [NSMutableArray array];
[buttons addObject: Button1];
[buttons addObject: Button2];
[buttons addObject: Button3];
[buttons addObject: Button4];
[buttons addObject: Button5];
[buttons addObject: Button6];

for (UIButton *button in buttons) {
    button.titleLabel.font = [UIFont fontWithName:@"myCustomFont" size:16];
}

或

for (int i=1;i<7;i++) {
    SEL selector = selectorFromString([NSString stringWithFormat:@"Button%d", i]);
    UIButton *button = [self performSelector:selector];
    button.titleLabel.font = [UIFont fontWithName:@"myCustomFont" size:16];
}

Answer 3

好吧，我想你可以将所有按钮放在一个数组中，然后通过它快速枚举。


NSArray *buttons; 
//Put all of your buttons inhere
for (UIButton *button in buttons)
{
    button.titleLabel.font = [UIFont fontWithName:@"myCustomFont" size:16];
}

Answer 4

这个怎么样？ currentView是包含所有按钮的UIView。

NSArray* buttonsArray = currentView.subviews;

for((UIButton*) button in buttonsArray)
{
     button.titleLabel.font = [UIFont fontWithName:@"myCustomFont" size:16];
}

循环遍历Objective-C中的对象

4 个答案: